In accordance with composite soil nailing technology for deep excavation

the FLAC3D is used to simulate the process of construction by composite cement-soil nailing wall. During the simulation Mohr-Coulomb model is used and contact elements are applied to the interfaces between the soil nailing and soil. This simulation offers the axial force of soil nailing along nails length distribution

the horizontal displacements of soil

the settlements of ground

the uplifts in the bottom of the pit and the potential slip surface foundation pit in every step. The comparative results show that the FLAC3D results are basically consistent with data of field test. The FLAC3D results are worth use for reference in practical applications and design too. Furthermore

the agreement shows that FLAC3D model and analytical method are reliable. And the results of FLAC3D numerical simulations can satisfy the need of engineering

so it can be well applied to analyze and predict practical engineering.